What are genes?
the observable characteristic
the expressed trait
the basic unit of inheritance
tr
the measurable factor

Genes are the basic unit of inheritance.

●basic unit of inheritance is your answer

affirmative action refers to the policies that take gender, race, or ethnicity into account in order to promote equal opportunity.

employers subject to title vii are prohibited from taking race or sex into account in any employment decisions. aa is a penalty for having any job group substantially statistically "underutilized" in any race or either sex. the employer must take steps to eliminate the underutilization, then stop, ending its aa efforts